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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <qndefnfctextrecord.h>
#include <QtCore/QStringConverter>
#include <QtCore/QLocale>
QT_BEGIN_NAMESPACE
/*!
\class QNdefNfcTextRecord
\brief The QNdefNfcTextRecord class provides an NFC RTD-Text.
\ingroup connectivity-nfc
\inmodule QtNfc
\since 5.2
RTD-Text encapsulates a user displayable text record.
*/
/*!
\enum QNdefNfcTextRecord::Encoding
This enum describes the text encoding standard used.
\value Utf8 The text is encoded with UTF-8.
\value Utf16 The text is encoding with UTF-16.
*/
/*!
\fn QNdefNfcTextRecord::QNdefNfcTextRecord()
Constructs an empty NFC text record of type \l QNdefRecord::NfcRtd.
*/
/*!
\fn QNdefNfcTextRecord::QNdefNfcTextRecord(const QNdefRecord& other)
Constructs a new NFC text record that is a copy of \a other.
*/
/*!
Returns the locale of the text record.
*/
QString QNdefNfcTextRecord::locale() const
{
const QByteArray p = payload();
if (p.isEmpty())
return QString();
const quint8 status = p.at(0);
const quint8 codeLength = status & 0x3f;
if (p.size() < 1 + codeLength)
return QString();
return QString::fromLatin1(p.constData() + 1, codeLength);
}
/*!
Sets the locale of the text record to \a locale. Locales longer
than 63 bytes will be truncated.
*/
void QNdefNfcTextRecord::setLocale(const QString &locale)
{
QByteArray p = payload();
const quint8 status = p.isEmpty() ? 0 : p.at(0);
const quint8 codeLength = status & 0x3f;
// Preserve encoding and RFU bits only (bits 7 and 6)
const quint8 statusWithoutLanguageCodeLength = status & 0xc0;
QByteArray localeData = locale.toLatin1();
if (localeData.size() > 0x3f) {
qWarning("QNdefNfcTextRecord::setLocale(): locale is %" PRIdQSIZETYPE " bytes long but max "
"is 63. Truncating it.", localeData.size());
localeData.truncate(0x3f);
}
const quint8 newStatus = statusWithoutLanguageCodeLength | localeData.size();
p[0] = newStatus;
p.replace(1, codeLength, localeData);
setPayload(p);
}
/*!
Returns the contents of the text record as a string.
*/
QString QNdefNfcTextRecord::text() const
{
const QByteArray p = payload();
if (p.isEmpty())
return QString();
const quint8 status = p.at(0);
const bool utf16 = status & 0x80;
const quint8 codeLength = status & 0x3f;
if (p.size() < 1 + codeLength)
return QString();
auto toUnicode = QStringDecoder(
utf16 ? QStringDecoder::Encoding::Utf16BE : QStringDecoder::Encoding::Utf8,
QStringDecoder::Flag::Stateless);
return toUnicode(QByteArrayView(p.constData() + 1 + codeLength, p.size() - 1 - codeLength));
}
/*!
Sets the contents of the text record to \a text.
*/
void QNdefNfcTextRecord::setText(const QString text)
{
if (payload().isEmpty())
setLocale(QLocale().name());
QByteArray p = payload();
const quint8 status = p.at(0);
const bool utf16 = status & 0x80;
const quint8 codeLength = status & 0x3f;
p.truncate(1 + codeLength);
auto fromUnicode = QStringEncoder(
utf16? QStringEncoder::Encoding::Utf16BE : QStringEncoder::Encoding::Utf8,
QStringEncoder::Flag::Stateless|QStringEncoder::Flag::WriteBom);
p += fromUnicode(text);
setPayload(p);
}
/*!
Returns the encoding of the contents.
*/
QNdefNfcTextRecord::Encoding QNdefNfcTextRecord::encoding() const
{
if (payload().isEmpty())
return Utf8;
QByteArray p = payload();
const quint8 status = p.at(0);
const bool utf16 = status & 0x80;
if (utf16)
return Utf16;
else
return Utf8;
}
/*!
Sets the enconding of the contents to \a encoding.
*/
void QNdefNfcTextRecord::setEncoding(Encoding encoding)
{
QByteArray p = payload();
quint8 status = p.isEmpty() ? 0 : p.at(0);
const QString string = text();
if (encoding == Utf8)
status &= ~0x80;
else
status |= 0x80;
p[0] = status;
setPayload(p);
setText(string);
}
QT_END_NAMESPACE